SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
as-office.jp
SSL/TLS Certificate
SSL/TLS Certificate for as-office.jp
Valid- Issued by (CA)
- Google Trust Services
- Subject
- as-office.jp
- Valid from
- Aug 26, 2026
- Valid until
- Nov 24, 2026 (79 days remaining)
- Public key
- EC 256-bit
- Serial
- 2E73E2C30A751B060E7077657D0FC31C
- SHA-256 fingerprint
- 6F:F7:CE:15:B7:C8:B0:C4:78:D2:D7:75:43:95:BA:4A:E2:3C:B8:75:7B:E9:82:20:12:B7:EF:89:AE:EF:7B:FB
- Chain
- WE1 → GTS Root R4
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
Never get surprised by as-office.jp's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch as-office.jp continuously, notifying you the moment anything moves across all three signals:
Uptime
We visit the site from multiple regions worldwide and email you within minutes if it goes down, with a per-region breakdown so a real outage stands out from a regional blip.
DNS changes
We watch NS, MX, CAA, DNSSEC, CNAME and A/AAAA records, and identify the host, network, and ASN behind them, so a real migration or hijack stands out from routine noise.
TLS certificate
We warn you 30, 14, 7, and 1 days before it expires, and flag it if the issuing authority changes or the certificate is unexpectedly replaced.
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